WHISK together water and Coffee-mate in medium bowl until smooth. Whisk in eggs, mustard, remaining salt and remaining pepper. Pour evenly over strata. Cover with plastic wrap; refrigerate for 8 hours or overnight. Allow strata to stand at room temperature for 30 minutes prior to baking.

PREHEAT oven to 350° F.

BAKE, uncovered, for 45 to 50 minutes or until puffed and golden brown.